Question

The hemoglobin content per $100ml$ of the blood of a normal healthy adult is
A. $12-16g$
B. $5-11g$
C. $25-30g$
D. $17-20g$

Answer 1

Hint: Blood is the liquid connective tissue of the body. It consists of plasma, fluid, and blood cells including immune cells. Red blood corpuscles are the most abundant blood cells. They are called red due to the presence of hemoglobin pigment. This pigment carries oxygen molecules. This imparts the characteristic feature of red blood cells.

Complete answer: The blood is the red fluid substance that circulates in the whole body. It carries various important elements including oxygen. Oxygen is carried by haemoglobin pigment present inside the red blood cells. Now, red blood cells are the most important component of blood. The estimation of the total number of RBCs per microlitre of blood is called the total count of RBCs. A healthy person needs to have a minimum level of blood count to sustain the proper functioning of the body. A normal human being has a blood count of RBCs around 4.5 to 5 million RBCs per cubic millimeter of blood. It is known that the total count of RBCs in males is more than in females. A decrease in normal RBCs counts leads to a condition called anemia. This can be caused by loss of blood or destruction of RBCs. On the other hand, an abnormal rise in RBCs count leads to a condition called polycythemia.
Thus, the number of RBCs should be kept normal. The hemoglobin in RBCs also needs to be at a maintained level. $100ml$ of blood in a normal healthy individual carries $12-16g$ of hemoglobin.
So, the correct answer is option A.

Note: The level of the total count of RBCs is less in women as compared to males due to the fact that women undergo menstruation. The monthly blood flow leads to a decrease in the total RBC count. A red blood corpuscle contains about 280 million hemoglobin molecules.